[linux-block.git] / fs / bcachefs / bcachefs_ioctl.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_IOCTL_H
#define _BCACHEFS_IOCTL_H

#include <linux/uuid.h>
#include <asm/ioctl.h>
#include "bcachefs_format.h"

/*
 * Flags common to multiple ioctls:
 */
#define BCH_FORCE_IF_DATA_LOST		(1 << 0)
#define BCH_FORCE_IF_METADATA_LOST	(1 << 1)
#define BCH_FORCE_IF_DATA_DEGRADED	(1 << 2)
#define BCH_FORCE_IF_METADATA_DEGRADED	(1 << 3)

#define BCH_FORCE_IF_DEGRADED			\
	(BCH_FORCE_IF_DATA_DEGRADED|		\
	 BCH_FORCE_IF_METADATA_DEGRADED)

/*
 * If cleared, ioctl that refer to a device pass it as a pointer to a pathname
 * (e.g. /dev/sda1); if set, the dev field is the device's index within the
 * filesystem:
 */
#define BCH_BY_INDEX			(1 << 4)

/*
 * For BCH_IOCTL_READ_SUPER: get superblock of a specific device, not filesystem
 * wide superblock:
 */
#define BCH_READ_DEV			(1 << 5)

/* global control dev: */

/* These are currently broken, and probably unnecessary: */
#if 0
#define BCH_IOCTL_ASSEMBLE	_IOW(0xbc, 1, struct bch_ioctl_assemble)
#define BCH_IOCTL_INCREMENTAL	_IOW(0xbc, 2, struct bch_ioctl_incremental)

struct bch_ioctl_assemble {
	__u32			flags;
	__u32			nr_devs;
	__u64			pad;
	__u64			devs[];
};

struct bch_ioctl_incremental {
	__u32			flags;
	__u64			pad;
	__u64			dev;
};
#endif

/* filesystem ioctls: */

#define BCH_IOCTL_QUERY_UUID	_IOR(0xbc,	1,  struct bch_ioctl_query_uuid)

/* These only make sense when we also have incremental assembly */
#if 0
#define BCH_IOCTL_START		_IOW(0xbc,	2,  struct bch_ioctl_start)
#define BCH_IOCTL_STOP		_IO(0xbc,	3)
#endif

#define BCH_IOCTL_DISK_ADD	_IOW(0xbc,	4,  struct bch_ioctl_disk)
#define BCH_IOCTL_DISK_REMOVE	_IOW(0xbc,	5,  struct bch_ioctl_disk)
#define BCH_IOCTL_DISK_ONLINE	_IOW(0xbc,	6,  struct bch_ioctl_disk)
#define BCH_IOCTL_DISK_OFFLINE	_IOW(0xbc,	7,  struct bch_ioctl_disk)
#define BCH_IOCTL_DISK_SET_STATE _IOW(0xbc,	8,  struct bch_ioctl_disk_set_state)
#define BCH_IOCTL_DATA		_IOW(0xbc,	10, struct bch_ioctl_data)
#define BCH_IOCTL_FS_USAGE	_IOWR(0xbc,	11, struct bch_ioctl_fs_usage)
#define BCH_IOCTL_DEV_USAGE	_IOWR(0xbc,	11, struct bch_ioctl_dev_usage)
#define BCH_IOCTL_READ_SUPER	_IOW(0xbc,	12, struct bch_ioctl_read_super)
#define BCH_IOCTL_DISK_GET_IDX	_IOW(0xbc,	13,  struct bch_ioctl_disk_get_idx)
#define BCH_IOCTL_DISK_RESIZE	_IOW(0xbc,	14,  struct bch_ioctl_disk_resize)
#define BCH_IOCTL_DISK_RESIZE_JOURNAL _IOW(0xbc,15,  struct bch_ioctl_disk_resize_journal)

/* ioctl below act on a particular file, not the filesystem as a whole: */

#define BCHFS_IOC_REINHERIT_ATTRS	_IOR(0xbc, 64, const char __user *)

/*
 * BCH_IOCTL_QUERY_UUID: get filesystem UUID
 *
 * Returns user visible UUID, not internal UUID (which may not ever be changed);
 * the filesystem's sysfs directory may be found under /sys/fs/bcachefs with
 * this UUID.
 */
struct bch_ioctl_query_uuid {
	__uuid_t		uuid;
};

#if 0
struct bch_ioctl_start {
	__u32			flags;
	__u32			pad;
};
#endif

/*
 * BCH_IOCTL_DISK_ADD: add a new device to an existing filesystem
 *
 * The specified device must not be open or in use. On success, the new device
 * will be an online member of the filesystem just like any other member.
 *
 * The device must first be prepared by userspace by formatting with a bcachefs
 * superblock, which is only used for passing in superblock options/parameters
 * for that device (in struct bch_member). The new device's superblock should
 * not claim to be a member of any existing filesystem - UUIDs on it will be
 * ignored.
 */

/*
 * BCH_IOCTL_DISK_REMOVE: permanently remove a member device from a filesystem
 *
 * Any data present on @dev will be permanently deleted, and @dev will be
 * removed from its slot in the filesystem's list of member devices. The device
 * may be either offline or offline.
 *
 * Will fail removing @dev would leave us with insufficient read write devices
 * or degraded/unavailable data, unless the approprate BCH_FORCE_IF_* flags are
 * set.
 */

/*
 * BCH_IOCTL_DISK_ONLINE: given a disk that is already a member of a filesystem
 * but is not open (e.g. because we started in degraded mode), bring it online
 *
 * all existing data on @dev will be available once the device is online,
 * exactly as if @dev was present when the filesystem was first mounted
 */

/*
 * BCH_IOCTL_DISK_OFFLINE: offline a disk, causing the kernel to close that
 * block device, without removing it from the filesystem (so it can be brought
 * back online later)
 *
 * Data present on @dev will be unavailable while @dev is offline (unless
 * replicated), but will still be intact and untouched if @dev is brought back
 * online
 *
 * Will fail (similarly to BCH_IOCTL_DISK_SET_STATE) if offlining @dev would
 * leave us with insufficient read write devices or degraded/unavailable data,
 * unless the approprate BCH_FORCE_IF_* flags are set.
 */

struct bch_ioctl_disk {
	__u32			flags;
	__u32			pad;
	__u64			dev;
};

/*
 * BCH_IOCTL_DISK_SET_STATE: modify state of a member device of a filesystem
 *
 * @new_state		- one of the bch_member_state states (rw, ro, failed,
 *			  spare)
 *
 * Will refuse to change member state if we would then have insufficient devices
 * to write to, or if it would result in degraded data (when @new_state is
 * failed or spare) unless the appropriate BCH_FORCE_IF_* flags are set.
 */
struct bch_ioctl_disk_set_state {
	__u32			flags;
	__u8			new_state;
	__u8			pad[3];
	__u64			dev;
};

enum bch_data_ops {
	BCH_DATA_OP_SCRUB	= 0,
	BCH_DATA_OP_REREPLICATE	= 1,
	BCH_DATA_OP_MIGRATE	= 2,
	BCH_DATA_OP_NR		= 3,
};

/*
 * BCH_IOCTL_DATA: operations that walk and manipulate filesystem data (e.g.
 * scrub, rereplicate, migrate).
 *
 * This ioctl kicks off a job in the background, and returns a file descriptor.
 * Reading from the file descriptor returns a struct bch_ioctl_data_event,
 * indicating current progress, and closing the file descriptor will stop the
 * job. The file descriptor is O_CLOEXEC.
 */
struct bch_ioctl_data {
	__u32			op;
	__u32			flags;

	struct bpos		start;
	struct bpos		end;

	union {
	struct {
		__u32		dev;
		__u32		pad;
	}			migrate;
	struct {
		__u64		pad[8];
	};
	};
} __attribute__((packed, aligned(8)));

enum bch_data_event {
	BCH_DATA_EVENT_PROGRESS	= 0,
	/* XXX: add an event for reporting errors */
	BCH_DATA_EVENT_NR	= 1,
};

struct bch_ioctl_data_progress {
	__u8			data_type;
	__u8			btree_id;
	__u8			pad[2];
	struct bpos		pos;

	__u64			sectors_done;
	__u64			sectors_total;
} __attribute__((packed, aligned(8)));

struct bch_ioctl_data_event {
	__u8			type;
	__u8			pad[7];
	union {
	struct bch_ioctl_data_progress p;
	__u64			pad2[15];
	};
} __attribute__((packed, aligned(8)));

struct bch_replicas_usage {
	__u64			sectors;
	struct bch_replicas_entry r;
} __attribute__((packed));

static inline struct bch_replicas_usage *
replicas_usage_next(struct bch_replicas_usage *u)
{
	return (void *) u + replicas_entry_bytes(&u->r) + 8;
}

/*
 * BCH_IOCTL_FS_USAGE: query filesystem disk space usage
 *
 * Returns disk space usage broken out by data type, number of replicas, and
 * by component device
 *
 * @replica_entries_bytes - size, in bytes, allocated for replica usage entries
 *
 * On success, @replica_entries_bytes will be changed to indicate the number of
 * bytes actually used.
 *
 * Returns -ERANGE if @replica_entries_bytes was too small
 */
struct bch_ioctl_fs_usage {
	__u64			capacity;
	__u64			used;
	__u64			online_reserved;
	__u64			persistent_reserved[BCH_REPLICAS_MAX];

	__u32			replica_entries_bytes;
	__u32			pad;

	struct bch_replicas_usage replicas[0];
};

/*
 * BCH_IOCTL_DEV_USAGE: query device disk space usage
 *
 * Returns disk space usage broken out by data type - both by buckets and
 * sectors.
 */
struct bch_ioctl_dev_usage {
	__u64			dev;
	__u32			flags;
	__u8			state;
	__u8			pad[7];

	__u32			bucket_size;
	__u64			nr_buckets;
	__u64			available_buckets;

	__u64			buckets[BCH_DATA_NR];
	__u64			sectors[BCH_DATA_NR];

	__u64			ec_buckets;
	__u64			ec_sectors;
};

/*
 * BCH_IOCTL_READ_SUPER: read filesystem superblock
 *
 * Equivalent to reading the superblock directly from the block device, except
 * avoids racing with the kernel writing the superblock or having to figure out
 * which block device to read
 *
 * @sb		- buffer to read into
 * @size	- size of userspace allocated buffer
 * @dev		- device to read superblock for, if BCH_READ_DEV flag is
 *		  specified
 *
 * Returns -ERANGE if buffer provided is too small
 */
struct bch_ioctl_read_super {
	__u32			flags;
	__u32			pad;
	__u64			dev;
	__u64			size;
	__u64			sb;
};

/*
 * BCH_IOCTL_DISK_GET_IDX: give a path to a block device, query filesystem to
 * determine if disk is a (online) member - if so, returns device's index
 *
 * Returns -ENOENT if not found
 */
struct bch_ioctl_disk_get_idx {
	__u64			dev;
};

/*
 * BCH_IOCTL_DISK_RESIZE: resize filesystem on a device
 *
 * @dev		- member to resize
 * @nbuckets	- new number of buckets
 */
struct bch_ioctl_disk_resize {
	__u32			flags;
	__u32			pad;
	__u64			dev;
	__u64			nbuckets;
};

/*
 * BCH_IOCTL_DISK_RESIZE_JOURNAL: resize journal on a device
 *
 * @dev		- member to resize
 * @nbuckets	- new number of buckets
 */
struct bch_ioctl_disk_resize_journal {
	__u32			flags;
	__u32			pad;
	__u64			dev;
	__u64			nbuckets;
};

#endif /* _BCACHEFS_IOCTL_H */
Commit	Line	Data
1c6fdbd8 KO	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _BCACHEFS_IOCTL_H
	3	#define _BCACHEFS_IOCTL_H
	4
	5	#include <linux/uuid.h>
	6	#include <asm/ioctl.h>
	7	#include "bcachefs_format.h"
	8
	9	/*
	10	* Flags common to multiple ioctls:
	11	*/
	12	#define BCH_FORCE_IF_DATA_LOST (1 << 0)
	13	#define BCH_FORCE_IF_METADATA_LOST (1 << 1)
	14	#define BCH_FORCE_IF_DATA_DEGRADED (1 << 2)
	15	#define BCH_FORCE_IF_METADATA_DEGRADED (1 << 3)
	16
	17	#define BCH_FORCE_IF_DEGRADED \
	18	(BCH_FORCE_IF_DATA_DEGRADED\| \
	19	BCH_FORCE_IF_METADATA_DEGRADED)
	20
	21	/*
	22	* If cleared, ioctl that refer to a device pass it as a pointer to a pathname
	23	* (e.g. /dev/sda1); if set, the dev field is the device's index within the
	24	* filesystem:
	25	*/
	26	#define BCH_BY_INDEX (1 << 4)
	27
	28	/*
	29	* For BCH_IOCTL_READ_SUPER: get superblock of a specific device, not filesystem
	30	* wide superblock:
	31	*/
	32	#define BCH_READ_DEV (1 << 5)
	33
	34	/* global control dev: */
	35
	36	/* These are currently broken, and probably unnecessary: */
	37	#if 0
	38	#define BCH_IOCTL_ASSEMBLE _IOW(0xbc, 1, struct bch_ioctl_assemble)
	39	#define BCH_IOCTL_INCREMENTAL _IOW(0xbc, 2, struct bch_ioctl_incremental)
	40
	41	struct bch_ioctl_assemble {
	42	__u32 flags;
	43	__u32 nr_devs;
	44	__u64 pad;
	45	__u64 devs[];
	46	};
	47
	48	struct bch_ioctl_incremental {
	49	__u32 flags;
	50	__u64 pad;
	51	__u64 dev;
	52	};
	53	#endif
	54
	55	/* filesystem ioctls: */
	56
	57	#define BCH_IOCTL_QUERY_UUID _IOR(0xbc, 1, struct bch_ioctl_query_uuid)
	58
	59	/* These only make sense when we also have incremental assembly */
	60	#if 0
	61	#define BCH_IOCTL_START _IOW(0xbc, 2, struct bch_ioctl_start)
	62	#define BCH_IOCTL_STOP _IO(0xbc, 3)
	63	#endif
	64
65	#define BCH_IOCTL_DISK_ADD _IOW(0xbc, 4, struct bch_ioctl_disk)
66	#define BCH_IOCTL_DISK_REMOVE _IOW(0xbc, 5, struct bch_ioctl_disk)
67	#define BCH_IOCTL_DISK_ONLINE _IOW(0xbc, 6, struct bch_ioctl_disk)
68	#define BCH_IOCTL_DISK_OFFLINE _IOW(0xbc, 7, struct bch_ioctl_disk)
69	#define BCH_IOCTL_DISK_SET_STATE _IOW(0xbc, 8, struct bch_ioctl_disk_set_state)
70	#define BCH_IOCTL_DATA _IOW(0xbc, 10, struct bch_ioctl_data)
22502ac2 KO	71	#define BCH_IOCTL_FS_USAGE _IOWR(0xbc, 11, struct bch_ioctl_fs_usage)
22502ac2 KO	72	#define BCH_IOCTL_DEV_USAGE _IOWR(0xbc, 11, struct bch_ioctl_dev_usage)
1c6fdbd8 KO	73	#define BCH_IOCTL_READ_SUPER _IOW(0xbc, 12, struct bch_ioctl_read_super)
1c6fdbd8 KO	74	#define BCH_IOCTL_DISK_GET_IDX _IOW(0xbc, 13, struct bch_ioctl_disk_get_idx)
19b505a9	75	#define BCH_IOCTL_DISK_RESIZE _IOW(0xbc, 14, struct bch_ioctl_disk_resize)
e8c851b3	76	#define BCH_IOCTL_DISK_RESIZE_JOURNAL _IOW(0xbc,15, struct bch_ioctl_disk_resize_journal)
19b505a9 KO	77
	78	/* ioctl below act on a particular file, not the filesystem as a whole: */
	79
	80	#define BCHFS_IOC_REINHERIT_ATTRS _IOR(0xbc, 64, const char __user *)
1c6fdbd8 KO	81
	82	/*
	83	* BCH_IOCTL_QUERY_UUID: get filesystem UUID
	84	*
	85	* Returns user visible UUID, not internal UUID (which may not ever be changed);
	86	* the filesystem's sysfs directory may be found under /sys/fs/bcachefs with
	87	* this UUID.
	88	*/
	89	struct bch_ioctl_query_uuid {
	90	__uuid_t uuid;
	91	};
	92
	93	#if 0
	94	struct bch_ioctl_start {
	95	__u32 flags;
	96	__u32 pad;
	97	};
	98	#endif
	99
	100	/*
	101	* BCH_IOCTL_DISK_ADD: add a new device to an existing filesystem
	102	*
	103	* The specified device must not be open or in use. On success, the new device
	104	* will be an online member of the filesystem just like any other member.
	105	*
	106	* The device must first be prepared by userspace by formatting with a bcachefs
	107	* superblock, which is only used for passing in superblock options/parameters
	108	* for that device (in struct bch_member). The new device's superblock should
	109	* not claim to be a member of any existing filesystem - UUIDs on it will be
	110	* ignored.
	111	*/
	112
	113	/*
	114	* BCH_IOCTL_DISK_REMOVE: permanently remove a member device from a filesystem
	115	*
	116	* Any data present on @dev will be permanently deleted, and @dev will be
	117	* removed from its slot in the filesystem's list of member devices. The device
	118	* may be either offline or offline.
	119	*
	120	* Will fail removing @dev would leave us with insufficient read write devices
	121	* or degraded/unavailable data, unless the approprate BCH_FORCE_IF_* flags are
	122	* set.
	123	*/
	124
	125	/*
	126	* BCH_IOCTL_DISK_ONLINE: given a disk that is already a member of a filesystem
	127	* but is not open (e.g. because we started in degraded mode), bring it online
	128	*
	129	* all existing data on @dev will be available once the device is online,
	130	* exactly as if @dev was present when the filesystem was first mounted
	131	*/
	132
	133	/*
	134	* BCH_IOCTL_DISK_OFFLINE: offline a disk, causing the kernel to close that
	135	* block device, without removing it from the filesystem (so it can be brought
	136	* back online later)
	137	*
	138	* Data present on @dev will be unavailable while @dev is offline (unless
	139	* replicated), but will still be intact and untouched if @dev is brought back
	140	* online
	141	*
	142	* Will fail (similarly to BCH_IOCTL_DISK_SET_STATE) if offlining @dev would
	143	* leave us with insufficient read write devices or degraded/unavailable data,
	144	* unless the approprate BCH_FORCE_IF_* flags are set.
145	*/
146
147	struct bch_ioctl_disk {
148	__u32 flags;
149	__u32 pad;
150	__u64 dev;
151	};
152
153	/*
154	* BCH_IOCTL_DISK_SET_STATE: modify state of a member device of a filesystem
155	*
156	* @new_state - one of the bch_member_state states (rw, ro, failed,
157	* spare)
158	*
159	* Will refuse to change member state if we would then have insufficient devices
160	* to write to, or if it would result in degraded data (when @new_state is
161	* failed or spare) unless the appropriate BCH_FORCE_IF_* flags are set.
162	*/
163	struct bch_ioctl_disk_set_state {
164	__u32 flags;
165	__u8 new_state;
166	__u8 pad[3];
167	__u64 dev;
168	};
169
170	enum bch_data_ops {
171	BCH_DATA_OP_SCRUB = 0,
172	BCH_DATA_OP_REREPLICATE = 1,
173	BCH_DATA_OP_MIGRATE = 2,
174	BCH_DATA_OP_NR = 3,
175	};
176
177	/*
178	* BCH_IOCTL_DATA: operations that walk and manipulate filesystem data (e.g.
179	* scrub, rereplicate, migrate).
180	*
181	* This ioctl kicks off a job in the background, and returns a file descriptor.
182	* Reading from the file descriptor returns a struct bch_ioctl_data_event,
183	* indicating current progress, and closing the file descriptor will stop the
184	* job. The file descriptor is O_CLOEXEC.
185	*/
186	struct bch_ioctl_data {
187	__u32 op;
188	__u32 flags;
189
190	struct bpos start;
191	struct bpos end;
192
193	union {
194	struct {
195	__u32 dev;
196	__u32 pad;
197	} migrate;
198	struct {
199	__u64 pad[8];
200	};
201	};
202	} __attribute__((packed, aligned(8)));
203
204	enum bch_data_event {
205	BCH_DATA_EVENT_PROGRESS = 0,
206	/* XXX: add an event for reporting errors */
207	BCH_DATA_EVENT_NR = 1,
208	};
209
210	struct bch_ioctl_data_progress {
211	__u8 data_type;
212	__u8 btree_id;
213	__u8 pad[2];
214	struct bpos pos;
215
216	__u64 sectors_done;
217	__u64 sectors_total;
218	} __attribute__((packed, aligned(8)));
219
220	struct bch_ioctl_data_event {
221	__u8 type;
222	__u8 pad[7];
223	union {
224	struct bch_ioctl_data_progress p;
225	__u64 pad2[15];
226	};
227	} __attribute__((packed, aligned(8)));
228
22502ac2 KO	229	struct bch_replicas_usage {
	230	__u64 sectors;
	231	struct bch_replicas_entry r;
	232	} __attribute__((packed));
1c6fdbd8	233
22502ac2 KO	234	static inline struct bch_replicas_usage *
	235	replicas_usage_next(struct bch_replicas_usage *u)
	236	{
	237	return (void *) u + replicas_entry_bytes(&u->r) + 8;
	238	}
1c6fdbd8	239
22502ac2 KO	240	/*
	241	* BCH_IOCTL_FS_USAGE: query filesystem disk space usage
	242	*
	243	* Returns disk space usage broken out by data type, number of replicas, and
	244	* by component device
	245	*
	246	* @replica_entries_bytes - size, in bytes, allocated for replica usage entries
	247	*
	248	* On success, @replica_entries_bytes will be changed to indicate the number of
	249	* bytes actually used.
	250	*
	251	* Returns -ERANGE if @replica_entries_bytes was too small
	252	*/
1c6fdbd8 KO	253	struct bch_ioctl_fs_usage {
	254	__u64 capacity;
	255	__u64 used;
	256	__u64 online_reserved;
	257	__u64 persistent_reserved[BCH_REPLICAS_MAX];
22502ac2 KO	258
	259	__u32 replica_entries_bytes;
	260	__u32 pad;
	261
	262	struct bch_replicas_usage replicas[0];
1c6fdbd8 KO	263	};
	264
	265	/*
22502ac2	266	* BCH_IOCTL_DEV_USAGE: query device disk space usage
1c6fdbd8	267	*
22502ac2 KO	268	* Returns disk space usage broken out by data type - both by buckets and
22502ac2 KO	269	* sectors.
1c6fdbd8	270	*/
22502ac2 KO	271	struct bch_ioctl_dev_usage {
	272	__u64 dev;
	273	__u32 flags;
	274	__u8 state;
	275	__u8 pad[7];
	276
	277	__u32 bucket_size;
	278	__u64 nr_buckets;
649a9b68	279	__u64 available_buckets;
1c6fdbd8	280
22502ac2 KO	281	__u64 buckets[BCH_DATA_NR];
22502ac2 KO	282	__u64 sectors[BCH_DATA_NR];
649a9b68 KO	283
	284	__u64 ec_buckets;
	285	__u64 ec_sectors;
1c6fdbd8 KO	286	};
	287
	288	/*
	289	* BCH_IOCTL_READ_SUPER: read filesystem superblock
	290	*
	291	* Equivalent to reading the superblock directly from the block device, except
	292	* avoids racing with the kernel writing the superblock or having to figure out
	293	* which block device to read
	294	*
	295	* @sb - buffer to read into
	296	* @size - size of userspace allocated buffer
	297	* @dev - device to read superblock for, if BCH_READ_DEV flag is
	298	* specified
	299	*
	300	* Returns -ERANGE if buffer provided is too small
	301	*/
	302	struct bch_ioctl_read_super {
	303	__u32 flags;
	304	__u32 pad;
	305	__u64 dev;
	306	__u64 size;
	307	__u64 sb;
	308	};
	309
	310	/*
	311	* BCH_IOCTL_DISK_GET_IDX: give a path to a block device, query filesystem to
	312	* determine if disk is a (online) member - if so, returns device's index
	313	*
	314	* Returns -ENOENT if not found
	315	*/
	316	struct bch_ioctl_disk_get_idx {
	317	__u64 dev;
	318	};
	319
	320	/*
	321	* BCH_IOCTL_DISK_RESIZE: resize filesystem on a device
	322	*
	323	* @dev - member to resize
	324	* @nbuckets - new number of buckets
	325	*/
	326	struct bch_ioctl_disk_resize {
	327	__u32 flags;
	328	__u32 pad;
	329	__u64 dev;
	330	__u64 nbuckets;
	331	};
	332
e8c851b3 KO	333	/*
	334	* BCH_IOCTL_DISK_RESIZE_JOURNAL: resize journal on a device
	335	*
	336	* @dev - member to resize
	337	* @nbuckets - new number of buckets
	338	*/
	339	struct bch_ioctl_disk_resize_journal {
	340	__u32 flags;
	341	__u32 pad;
	342	__u64 dev;
	343	__u64 nbuckets;
	344	};
	345
1c6fdbd8	346	#endif /* _BCACHEFS_IOCTL_H */